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// Copyright (c) 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "config.h"
#include "ExceptionContext.h"
#include "Node.h"
namespace WebCore {
// Unlike JSC, which stores exceptions in ExecState that is accessible from
// ScriptController that is retrievable from Node*, V8 uses static chain of
// handlers (encapsulated as v8::TryCatch and here as ExceptionCatcher)
// to track exceptions, so it has no need for Node*.
ExceptionContext::ExceptionContext(Node* node)
{
}
ExceptionContext::ExceptionContext()
: m_exception()
, m_exceptionCatcher(0)
{
}
void ExceptionContext::setExceptionCatcher(ExceptionCatcher* exceptionCatcher)
{
if (m_exceptionCatcher && exceptionCatcher)
m_exceptionCatcher->detachContext();
m_exceptionCatcher = exceptionCatcher;
}
bool ExceptionContext::hadException()
{
if (m_exceptionCatcher)
m_exceptionCatcher->updateContext();
return !m_exception.IsEmpty();
}
JSException ExceptionContext::exception() const
{
return m_exception;
}
JSException ExceptionContext::noException()
{
return v8::Local<v8::Value>();
}
ExceptionCatcher::ExceptionCatcher(ExceptionContext* exceptionContext)
: m_context(exceptionContext)
, m_catcher()
{
exceptionContext->setExceptionCatcher(this);
}
void ExceptionCatcher::detachContext()
{
m_context = 0;
}
void ExceptionCatcher::updateContext()
{
ASSERT(m_context);
if (m_catcher.HasCaught())
m_context->setException(m_catcher.Exception());
else
m_context->setException(ExceptionContext::noException());
}
ExceptionCatcher::~ExceptionCatcher()
{
if (!m_context)
return;
updateContext();
m_context->setExceptionCatcher(0);
}
} // namespace WebCore
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